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  3. Mineral Resource Data System (MRDS)

Grey Eagle Mine

Past Producer in Glenn county in California, United States with commodity Chromium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Land status
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10098580
MRDS ID M100641
Record type Site
Current site name Grey Eagle Mine

Geographic coordinates

Geographic coordinates: -122.60275, 39.73792 (WGS84)
Elevation 768
Relative position APPROX. 2.5 MI NW OF CHROME, CA.

Site location context

Political divisions (FIPS codes)

Glenn(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chrome(quadrangle 1:24,000 scale)

Willows(quadrangle 1:100,000 scale)

Ukiah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Stony(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Mendocino National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Glenn

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 022N 007E 25 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Uvarovite Ore
Magnesite Gangue
Opal Gangue
Talc Gangue

Alteration

  • (Local) Serpentinized Dunite

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Harzburgite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite

Nearby scientific data

(1) -122.60275, 39.73792
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N20E
    Dip 45 NW
    Thickness 30.48M
    Length 228.6M
    Width 99.06M

Controls for ore emplacement

  • Normal And Reverse Faulting

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category National Forest

Reserves and resources

  • Type In-situ
    Estimate year 1975
    Total resources 1000mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 13 wt-pct Chromium Major 1975

Workings at the site

  • Type of workings Surface/Underground
    Area 20HA
    Overall depth 50M
    Overall length 228.6M
    Overall width 60M

Comments on the workings information

  • WORKINGS CONSIST OF ONE LARGE OPEN PIT (DIMENSIONS GIVEN ABOVE), A FEW SHAFTS, AND A FUNNEL.

Reference information

Bibliographic references

  • Deposit

    STINSON, M.C., 1975, MINERAL PROPERTY REPORT: CDMG UNPUBLISHED REPORT

  • Deposit

    USGS BULL 945-A, 1944

  • Production

    STINSON, 1975, MINERAL PROPERTY REPORT; CDMG

  • Reserve-Resource

    STINSON, 1975, MINERAL PROPERTY REPORT: CDMG

General comments

Subject category Comment text
Deposit ORE CONSISTS USUALLY OF FINE-GRAINED CHROMITE EVENLY DISSEMINATED IN SERPENTINE MATRIX

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1980 Oster, Karel L. (Albers, John P.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.